Peavey Music - Page 7 - Recent Questions, Troubleshooting & Support

https://www.allaboutcircuits.com/textbook/direct-current/chpt-14/electromagnetic-induction/ The AC power changes the magnetic field and may be being picked up in your amplified leads . Or the DC voltage in your amps power supply is not filtering the power after it rectifies the AC power .A really big capacitor across the dc voltage output from the rectifier should filter any AC out. https://www.allaboutcircuits.com/textbook/experiments/chpt-5/rectifier-filter-circuit/

Disconnect the leads from the 12". Put a voltmeter across the speaker terminals and check for continuity. If it reads open, the speaker is dead.

Why not un-complicate the circuits by eliminating the soundboard first?

FB2 SAB is a 'cement' type resistor.The value is 560 ohms.The power rating is 3 watts.

but you would have to go to Peavey direct for service info.

Download the schematics.... https://elektrotanya.com/peavey_cs800s.pdf/download.html

https://www.google.co.za/url?sa=t&source=web&rct=j&url=https://www.manualslib.com/manual/121231/Peavey-Programax-10.html&ved=0ahUKEwjYt_2T0ePSAhWJKcAKHbbBBe0QFggaMAE&usg=AFQjCNEj73j40pNjQwVnQCnNGH8EZjt-3g&sig2=Fi05Gh3RwaYJEePyOcMDeQ

You need to contact Peavey directly for the best solution. Here's their links- peavey com

What is your question about the mixer?

Pick any input channel you like and connect the sr16 with 1/4" phone3 jack cables.